Stock fitting machine



May 28, 1940. s, BARCN] 2,202,081

STOCK FITTING MACHINE Y Filed Dec. 22, 1938 0 A w Mk Patented May 28, 1940 PATENT OFFICE 2,202,081 1 STOCK FITTING MACHINE Sante Baroni, Philadelphia, Pa., assignorto United Shoe Machinery Corporation, Borough of Flemington, N. J., a corporation of New Jersey Application December 22, 1938, Serial No. 247,251

7 Claims.

This invention relates to improvements in stock fitting machines and more particularly to the work feeding mechanism for machines of that type, and is illustrated by way of example as embodied in a machine for skiving or feather edging soles for boots and shoes.

In a type of feather edge and shank reducing machine in common use, the feed wheel is lo- ,cated outwardly from the machine head beyond the end of the edge knife. results in the feed wheel engaging the sole being operated upon inwardly from the edge of the sole at a point beyond the end of the edge knife and produces a torque in the marginal portion of the sole inasmuch as the line of application of force from the feed wheel is ofiset from the resistance offered by the edge knife to the movement of the sole. The torque thus set up in the marginal portion of the sole is undesirable because it pulls that portion of lighter sole members out of shape, the deformation'of the sole margin being especially bad when soles are operated upon while in a moist condition as the moisture in the leather makes it less resistant to the twisting stresses. In the construction of cemented shoes, for example, soles which have been pulled out of shape by the torque resulting from the feeding arrangement described above are the cause of trouble to the operator in the cement attaching operation as the soles must be twisted back into shape before the operator can apply-the sole attaching pressure. Another disadvantage resulting from the above-mentioned torque is that it is liable to turn the sole being "'operated upon about the end of the edge knife thus moving the sole away from the proper line of feed and when the necessary corrective counter movement of the sole is made to bring it back to the proper line of feed, a jagged cut is made "by the knife.

With the above conditions in mind, it is an object of this invention to provide an improved Work feeding means which will either eliminate or reduce, to an unobjectionable amount, the

-torque in the marginal portion of the sole caused by the work feed.

To this end, a feature of this invention consists in an arrangement whereby feeding pressure is applied to the margin of a sole being This arrangement wheel in the marginal portion of the sole being operated upon immediately ahead of the edge knife,

With the above and other objects in View, the invention will be described with reference to the accompanying drawings and will be pointed out in the appended claims.

Fig. 1 is a side elevation partly in section of a portion of a machine embodying this invention;

Fig. 2 is a view taken along lines II--II of Fig. 1 looking in the direction of the arrows;

Fig. 3 is a perspective view taken from a point somewhat below and to the right of the presser foot shown in Fig. 2 and illustrating the relationship of the presser foot, auxiliary feed wheel and main feed wheel, and

Fig. 4 is a view similar to Fig. 3 illustrating another embodiment of my invention.

This invention is illustrated as embodied in a machine of the type disclosed in the United States Letters Patent No. 114,994, granted May 16, 1871, upon an application filed in the name of Henry S. Vrooman. The illustrated machine comprises a lower work supporting roll If], an upper feed wheel l2, and a shank reducing knife 14 disposed at an angle to the peripheral work engaging face on the supporting roll 10. As the work is moved past the knife M by the feed wheel l2 it is held down against the surface of the supporting roll ID by a presser foot is which engages the work immediately ahead of the knife in the direction of feed. The presser foot I6 is attached to the head of the machine by screws passing through elongated openings l8 and 20 in the presser foot in a manner like that by which the presser foot 7c is attached to the arm or head f in the Vrooman machine. The arrangement of the parts so far described is similar to the equivalent structure in the above-mentioned patent to Vrooman to which reference may be had for a disclosure of their connection with the remainder of the machine.

As is best shown in Fig. 1, the feed wheel l2 engages the work inwardly of the edge at apoint adjacent to and beyond the end of the edge knife l hwhich is the usual arrangement in machines of this type. Thus, when the feed wheel I2 is operated to move the sole S through the machine the line of force exerted by it is parallel to and offset from the resistance offered by the knife M to the movement of the sole S thereby setting up a torque in the marginal portion of the sole which tends to move the sole away from the proper line of feed and in the case of cheaper sole stock and also of lighter sole stock, pulls the marginal portion of the sole that is being operated upon out of shape.

The torque is reduced to an unobjectionable amount in the illustrated machine by an auxiliary feed wheel 22 which is rotatably mounted in a recess 24 formed by spaced arms 25, El on the lower end of the presser foot l6 (Fig. 1), the lower edge of the auxiliary feed wheel 22 substantially coinciding with the work engaging surfaces 24, 25 on the foot arms 26, 21 (Fig. 3). As is best shown in Fig. 2, the auxiliary feed wheel 22 is located immediately ahead of theknife it in the direction of feed and almost over the forward edge of the knife and thus, in addition to applying a feeding force to the marginal portion of the sole directly against the resistance of the knife, will also assist the surfaces 2%, 25 of the presser foot It in holding the sole against the supporting roll it in the area in which the cut is being made and thereby prevent the sole from bunching ahead of the knife and causing a jagged cut to be made. The auxiliary feed wheel 22 is supported by a shaft 28 which is rotatably received in openings formed in the arms 26, 2? of the presser foot l5 and has an extension pro-- jecting beyond the arm 2? adjacent to the feed Wheel 52. Upon operation of the machine the auxiliary feed wheel is driven by the feed wheel if, the drive being through an internal gear (Fig. 1) formed on the side of the feed wheel l2 adjacent to the presser foot is and a pinion 32 meshing with the internal gear 33 and connected to the projecting end of the shaft 28. The supporting roll if! and feed wheel iii are rotated in opposite directions by shafts I l and it which may be actuated by a driving mechanism such as that shown in the above-mentioned Vrooman patent for rotating the equivalent shaits b and 0.

An alternative construction is disclosed in Fig. ,4 in which an auxiliary feed wheel 34 is mounted on one side of a pressure foot 36 and is connected to the internal gear 30 on a feed wheel l2 by a shaft 38 which is rotatably received in the presser foot 36 and has a pinion 49 connected thereto on the opposite side of the presser foot from the feed wheel 35 where it is in mesh with the internal gear 30. An advantage of this arrangement is that the auxiliary feed wheel will be located over the edge portion of a sole being operated upon,

which is the portion where the heaviest out is claim as new and desire to secure by Letters Patent of the United States is:

1. In a stock fitting machine, a work support, a knife arranged to operate in the marginal portion of work piece on said support, work feeding means comprising a feed wheel arranged to engage a work piece on the support inwardly of its edge, an auxiliary feed wheel arranged to engage the work piece ahead of the knife in the direction of the feed, and motion transmitting means for interconnecting the first mentioned feed wheel with the auxiliary feed wheel whereby one of feed wheels is driven by the other feed wheel.

2. A stock fitting machine comprising a work support, a knife having its cutting edge extending at an acute angle to the surface of the work support where it is arranged to operate on the marginal portion of a work piece on the support, a feed wheel arranged to engage the work inwardly of its edge and adjacent to the end of the knife, and a second feed wheel positioned for engagement with the work piece directly ahead of a portion of the cutting edge of the knife in the direction of the feed whereby feeding pressure from the second feed wheel will act directly against the resistance offered by the knife.

3. A stock fitting machine comprising a work support, a knife arranged to operate on the marginal portion of a work piece on the support, a presser member arranged to gage the depth of the cut made by the knife and to prevent heightwise movement of the work in the area in which the cut is being made, a feed wheel arranged to engage the work inwardly of its edge beyond the presser member, and an auxiliary feed wheel mounted on the presser member and arranged to engage-the work piece ahead of the knife.

4. A stock fitting machine comprising a work support, a knife arranged to operate on the marginal portionof a sole on the work support, a presser foot positioned directly ahead of the knife for holding the work against heightwise movement in the area in which the cut is being made, a feed wheel of relatively large diameter arranged to engage the work inwardly of its edge presser foot and arranged for engagement with the work ahead of the knife, and gear means for connecting the two feed wheels whereby the auxiliary feed wheel is driven by the feed wheel of relatively large diameter.

5. A stock fitting machine comprising a work support, a feed wheel arranged to engage a work piece inwardly of its edge, saidfeed wheel having an internal gear formed thereon, an auxiliary feed wheel arranged to engage the work piece on the support, and a pinion in driving engagement with said internal gear and coupled to the auxiliary feed wheel whereby the auxiliary feed wheel is driven by the feed wheel having the internal gear mounted thereon.

6. A work feeding unit for use in a stock fitting machine comprising a feed wheel having a gear member thereon, a presser foot, and a second feed wheel mounted on said presser foot, said second feed wheel having a gear member connected thereto adapted for engagement with the gear member on the first mentioned feed wheel whereby one of said wheels will take its drive from the other wheel.

'Z. In a stock fitting machine, a work support, a knife arranged to operate in the marginal portion of a work piece on the work support, a presser foot arranged to gage the depth of the cut made by said knife, a first feed wheel arranged to move the work piece past the knife, said first feed wheel being located closely adjacent to one side of the presser foot and having a gear member on its side adjacent to the presser foot, an auxiliary feed wheel mounted on thepresser foot, and means for interconnecting the first feed wheel with the auxiliary feed wheel, said means including a gear in meshing engagement with the gear member on the first feed wheel.

SANTE BARQNI. 

